Fish — breeding & neutering (neutering/spaying, reproduction, preventing unwanted litters)
Source: first-hand owner-practical care page, saved to source_file; every claim below is a C1 byte-substring of it.
Claims
Common goldfish are the hardiest as they haven’t been weakened by selective breeding.Many ‘fancy’ varieties of goldfish are more delicate because selective breeding has made them prone to inherited health problems.Just like with goldfish, selective breeding can have negative effects on their welfare.Example breeds are guppy, swordtail, platy and molly.- `In fact, they're known to live for up to 25 years and some can reach over 30cm!
Common goldfish are the hardiest as they haven’t been weakened by selective breeding.`
Breeding for exaggerated physical features has a negative impact on welfare, so we discourage the keeping of such fish.Position Don't put your aquarium near heat sources like direct sunlight and radiators and make sure it is on a sturdy surface.It is a good idea to get a separate fish tank heater to heat the water before you add it.
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Source: pdf-raw/companion-care/exotic_rspca_fish.txt · https://www.rspca.org.uk/adviceandwelfare/pets/fish